* {
    margin: 0;
    padding: 0;
}

.guodu {
    width: 200px;
    height: 200px;
    background-color: red;
}
.guodu:hover {
    width: 600px;
    height: 600px;
    background: skyblue;
    /* transition-property: width,height,background;
    transition-duration: 5s;
    transition-timing-function: ease-in-out;
    transition-delay: 2s; */
    transition: all 5s ease 2s;
}

.xy {
    width: 300px;
    height: 300px;
    position: relative;
}
.xy > img {
    width: 300px;
    height: 300px;
}
.test {
    width: 300px;
    height: 300px;
    position: absolute;
    top: 0px;
    right: 0px;
    opacity: 0;
}
.test:hover {
    opacity: 0.5;
    transition: all 0.5s;
}



.fly {
    width: 250px;
    height: 50px;
    background: #b0b0b0;
}
.fly span{
    float: left;
    line-height: 50px;
}
.fly-left {
    float: left;
    height: 50px;
    margin-left: 0px;
}
.fly:hover >.fly-left{
    margin-left: 10px;
    transition: all 2s;
}
.fly-left:hover {
    margin-left: 10px;
    transition: all 2s;
}
.fly-right  {
    opacity: 0;
    float: right;
    margin-right: 0px;
    height: 50px;
}
.fly:hover > .fly-right{
    opacity: 1;
    margin-right: 70px;
    transition: all 2s;
}
.fly-right:hover {
    opacity: 1;
    margin-right: 70px;
    transition: all 2s;
}